Adjustable gib for cross-heads.



BY z y 4 v I I Atlomey M- D. JOYNER.

ADJUSTABLE GIB FOR CROSS HEADS. APPLILCAILQN man mm. 21. 1916.

1,212,140. Patented Jan. 9,1917.

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l M. D". 'JOYNER: ADJUSTABLE GIB FOR CROSS HEADS.

APPLICATION FILED MAR. 21 I916. 1,212,140. Patented Jan. 9,1917.

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, I 229% v I raj-5w 1'0 3; 3 i. I I: W;Imur g2 I 1 BY 5 m ATTORNEY tion being taken on head mounted on a MILES D. JOYNER, 0F SAVANNAH, GEORGIA.

ADJUSTABLE GIB FOR CROSS-HEADS.

To all whom it may concern:

. Be it known that I, MILES D. JOYNER, a citizen of the United States, residing at Savannah, in the county of Chatham and State of Georgia, have invented a new and useful Adjustable Gib for Cross-Heads, of which the following-is a specification.

The present invention relates to an improved form of gib and mounting therefor on a cross head for engagement with the bars of a two-bar guide, and has for an object to simplify'and strengthen the gib and reduce the number of flanges and other projecting parts usually employed.

Another object of the invention is to provide apeculiar mounting for the gib on the cross head, which mounting admits of the minute adjustment of the gib from time to time, to take up even slight vertical and ateral Wear between the guide bar and the ib. g A further object of the invention is to provide an improved locking means, the opposite members or parts of which are detachably carried upon the cross head and upon the gib, respectively, so that the interlocking parts may be easily removed, for continued use with new gibs, and cross heads, or may be removed when they are roken or worn. I

Other objects and advantages of the invention will appear from the following descriptionof the present preferred embodiments of the invention, the same being shown in the accompanying drawings, wherein Figure .1 is a side elevation of a cross guide, and being con,- structed according to this invention. 2 is a longitudinal vertical section, taken centrally through the cross head and the parts carried thereby. Fig. '3 is a detail enlarged cross sectional view through'the cross head, the gib, and the fastening means for holding the gib on.the cross head, the secthe line 3'3 of Fig. 1. Fig. 4 is an inner face view of one of the gibs employed, showing the locking plates in position. Fig. 5 is a transverse section taken through the gib of Fig. 1, and through one of the locking plates. Fig. 6 is a detail enlarged perspective view of one of the locking keys. Fig. 7 is a side elevation of a portion of the cross head, showing a slightly modified form of key secured in position. Fig. 8 is a transi'erse sectional Specification of Letters Patent.

Application filed March 21, 1916. Serial No. 85,639. n

Fig.

Patented Jan. 9, 1917.

ing means therefor. section of the same, taken on the line 10-10 .of Fig. 9, and showing a modified form of key secured in position. Fig. 11 is a top plan view of the cross head with the modi fied form of gib secured thereto by the modified'form of locking means. Fig. 12 is a detail perspective view of the modified form of key. Fig. 13 is a detail perspective view of a further modified form of key. Fig. 14 is a sectional View through the locking plate of Fig. 2, and showing in section a still further modified form of locking key.

Referring to these drawings, 10 designates a cross head of the usual form, having connection at one end with the piston rod 11, and at its opposite end with the connecting rod 12. .Arranged above and below the cross head are the bars 13 of the ordinary twobar guide. As may be best seen from Fig. 2 ofthe drawings, the upper and lower faces of the cross head 10 are inclined to converge rearwardly. The cross head 10 has, at'its opposite sides vertically projecting walls or flanges 14, which extend up wardly and downwardly beyond the upper and lower inclined faces of the cross head. The walls 14 provide therebetWeen channels or recesses in the upper and lower edges of the cross head. Seated in these channels, and upon the upper and lower faces of the cross head 10, are a pair of gibs 15'. Each gib 15 is of a width to snugly fit between the walls 14, and is tapered from end to end to provide anouter face in parallelism with the guide bar 13 and an inner face inclined oppositely to and bearing against the inclined face of the cross head. -The longitudinal sliding movement of'the gib 15 in the channel of gib against the guide bar 13, and retains the outer face of the gib at all adjustments in parallelism with the inner side of the guide bar 13.

The gib 15 may be provided, adjacent one end, Wit achamberlo for the reception of,

a lubricant to be fed through openings-17 to the guide bar 13.

As shown in Figs. 1 to 8 inclusive, each gib 15 has dovetailed, in its inner inclined the cross head 10 advances the face, one or more transversely extending locking plates 18. The locking plates have spaced apart dovetail ribs 19 in their outer faces which extend transversely across the bottom of the gib 15. The plates 18, with their ribs 19, are countersunk and lie flush in the inner inclined face of the gib to admit of the free and uninterrupted longitudinal sliding of the gib 15.

As shown, each gib 15 is provided with a pair of these locking plates, and each plate has a long row of the dovetail ribs. It is to be understood that one, two, or more of these plates may be employed, according to the requirements.

The cross head able dovetail keys in each of its inclined outer faces, the keys extending transversely through the cross-head 1O opposite the lockt'ermesh with the key with any particularly in Fig.

an opening formed ing plates 18. Each key 20 has on its outer face several dovetail ribs 21 adapted to inthe dovetail ribs 19 of the locking plate. The locking plate 18 is relatively long, and the key.20 is relatively narrow, so that'the gib 15 and its lockingplate 18 may be shifted longitudinally of the cross head, and transversely of the key 20, into various positions to register the ribs 21 of desired plurality of the dovetail recesses between the ribs 19 of the locking plate. The gib 15 may thus be adjusted throughout practically the entire length of the locking plate 18. As shown (3, this locking key 20 is in the form 'of a relatively flat plate or base having its opposite longitudinal edges of dovetail form for sliding engagement in a correspondingly shaped transverse slot formed in the outer inclined face of the cross head, and opening through the opposite sides of the same. The inner end ofthe key 20 is provided with a head 22 extending across the outer face of the base of the key for engagement against the ends of the ribs 19 of the locking plate 18, when the key 20 is driven completely into place. The ribs 21 terminate at their inner ends shortof the head 22, such provision bein made for the easy manufacture and handling of the key, when making the dovetail ribs 21.

The forward or outer end of the key 20 has a longitudinally extending projection 23 in the form of a threaded shank for engagement through the side of the cross head 10, as shown in Fig. 3, to receive thereover a fasteningnut 24:, which binds a washer 25 against the side of the cross head. The nut 24, as shown in Figs. 1 and 3, has a plurality of diametrically extending slots 26, to re-- ceive a cotter pin 27, which passes through diametrically through the shank 23. Thus, the nut 24 is locked from turning, and from displacement with respect to the shank 23. The shank 23 projects from inner face of the key .key and the shank 23. In cross head 10 is suitably 10 has one or more detachthe intermediate portion of the key 20 and is preferably of greater diameter than the thickness of the base of the key. For this reason, the base of the key is ribbed or provided with a longitudinal projection 28, in alinement with the shank and the for reinforcing the this instance, the grooved in the bottom of the dovetail recess to accommodate this bead 28.

Each gib 15 is provided at its opposite longitudinaledges with a pair of outwardly extending flanges 29, which form, together with the base of the gib, a channel through which the adjacent guide bar 13 may slide. Theouter edges of the flanges 29 and the side walls 14: are flush, as shown in Fig. 3.

To take up side wear and prevent lateral play between the cross head 10 and the guide bar 13, the flanges 29 of the gib 15 have their inner faces or walls 30 flared or beveled outwardly, and the edges 31 of the guide bar 13 are converged or beveled inwardly. The edges 31 lie flat against the walls 30, and when the'gib 15 is advanced against the guide bar 13, the beveled walls 30 only further advance over the edges 31 and thus take up any wear between the same.

Figs. 7 and 8 show a modified form of key 20. Here the base is of uniform thickness throughout, and is provided with dovetail ribs 21 of the same form as disclosed in Fig. 6,

but extending throughout the entire length of the base. The key 2.0 is inserted from the outer side of the cross head 10, and is provided at its outer end with an upstanding head 22, apertured to receive a shank 23 projecting outwardly from the side of the cross head 10.

Two adjusting nuts 24 are mounted on the threaded shank 23 at the opposite sides of. the head 22 to hold the latter from iuward or outward movement, and to thus retain the key 20 rigidly in place. A lock nut 27 may be turned up against the outer adjusting nut 21 to bind the nuts in position, It is, of course, understood, that the nut 2-l and cotter pin 27 of the preferred form may be used for locking the modified form of key in place, and that the preferred form of key may be supplied with this modt fied form of securing means.

Inlieu of the locking plates 18 and the lIiU - The key 20 .tween the ribs 19 one or more bars, rectangular in crow section, carried on the.head 22 The cross head 10 has, for each row of closed rectangular recesses, one or more transverse rectangular slots to receive the bars of the key 20", as shown in Fig. 10. The key 20 is secured in place preferably by the same means shown in Fig. 8, and as above set forth. The locking plates 18 take the place of the dovetail recesses of the preferred form and hold the bars of the key 2O beto hold the gib from outmovement from the cross head 10. may also be held in place by cotter pins 32 engaging through the openings 33 in the free ends of the bars, as shown inl igr-lf. Fig. 13 shows a further modified form of key 20 composed of a single bar of rectangular form, and having no head. The key 20 has the openings 33 in its opposite ends to receive the cotter pins 32 to hold the key in place. One or more of these keys 20 may be employed.

In Fig. 14 is shown a still further modified form of locking key 20, with a dovetail intermediate rib 21, and lateral ribs 21 The rib 21 meshes between the ribs 19 of the locking plate 18 of Fig. 1. The lateral ribs 21 are beveled ofi' straight with the outer edges of the base of the key 20" and are undercutat their inner sides only. The same adjustment may be hadbetween the plate 18 and the key 20 as in the preferred form. 1

From the above description, it will be readily understood that when it is desired to take up wear between the gi'b 15 and the adjacent guide bar 13, it is only necessary to withdraw the key 20 from the side of the cross head 10 and release the locking plate 18, and to then slide the gib 15 .upon the inclined face of the cross head toward the ward guide bar 13. When the gib 15 is thus ad-- justed, the key 20 is again inserted in the cross head 10, the gib 15 being moved longitudinally until the dovetail intermesh, and the key is then driven into place and secured, such as by the nut 24 and cotter pin 27.

The key '20 is of dovetail formation, and the locking plate 18 is of dovetail formation, so that all of these parts are interlocked and the gib 15 is held not only from longitudinal movement within the channel at the outer edge of.the crow head 10, but is also held close to the cross head, and

from any outward movement toward the guide bar 13. For the purpose of insuring the withstanding of Wear upon the gib 15, it is preferable to-form the gib of Huntspellers white-gray iron, which is found to withstand the hard usage and wear to which gibs are'subjected.

The locking plates 18, which are dovetailed into t e gibs 15, may be easily removed from the not have to 'be made ribs 19 and 21 gibs by driving the plates laterally therefrom. Should the locking plates become loose, the side walls 14 of the cross head 10 provide stops to prevent the lateral movement of the locking plates, and thus hold all of the parts from any lateral or longitudinal displacement. This interlocking of the parts from movement in all directions is controlled by the fastening device, which is positioned upon the outer end of the key, so that this fastening device of the key must first be released to admit the withdrawal of the ke the gib must then be withdrawn, and finally the locking plates may be taken out of the inner face of the gib. The locking keys 20 are so placed in the cross head 10 that they are capable of withstanding considerable pressure, and do unnecessarily large or cumbersome. Consequently, relatively small recesses or openings may be provided ]in the cross head for accommodating these eys.

Figs. 9, 10 and 11 show a modified form of gib 15 which is split longitudinally into two sections or halves, each section carrying one of the flanges 29 The inner walls 30 of the flanges 29 are straight and parallel to each other. The outer walls 34 of the flanges 29 are converged or beveled longitudinally fromone end of thegib 15 to the other end thereof. The inner. walls 35 of the flanges 14 are planed or beveled oil to flare from one end of the cross head 10 to the other end thereof. The walls 34 and 35 are oppositely beveled to lie flat against each other throughout the entire lengths of their overlapping portions.

The inner edges of the sections of the gib 15 are reduced in thickness and overlapped. One section is recessed in its upper face to reduce the edge thereof and provide a shoulder 36. The opposite section is relatively to each other and advance the gib sections toward each other against the 0pposite edges 31 of the guide bar 13, and also moves the gib 15 as a whole outwardly against the inner face of the guide bar. This adjustment takes up lateral and verticall) Wear between the guide bar 13 and the i 15. I 1 g The keys 20 and 20 desired cross sectional rectangular as shown, channels in the cross maybe of any other configuration than and the recesses or head 10 and gib 15 I are preferably spirit of the latter,

corresponding. formed to provide a close fitfor the keys and to preylentd; any loose play of the gib on the cross 'All of the forms of keys 20 shown and above described are set forth as extending transversely through the cross head 10 and gib 15. It is to be understood that these keys may extend at any desired angle or angles across,or transversely of the cross head and gib and not necessarily at right angles to the longitudinal axis of the cross head.

It is, of course, understood that various changes and modifications may be made in the design and formation of the several parts of the above described embodiment of the invention, without departing from the and being restricted only by the scope of the following claims.

What is claimed is 1. In a device as specified, a guide bar, a

cross head, a gib adjustable on the crosshead for advancement toward said guide bar to take up wear between the same and the .inner face of the guide bar, and means for adjusting the gib against the lateral edges of the guide bar to take up the lateral wear therebetween.

2. In a device as specified, a guide bar, a cross head, a gib between the cross head and the guide bar to take up the wear of the guide bar, said cross head and said gib having oppositely inclined contacting faces whereby the longitudinal movement of the gib on the cross head advances the gib outwardly toward the guide bar to take up wear upon the inner face thereof, and means on the gib to advance the same against the lateral edges of the guide bar to take up lateral wear therebetween.

. 3. In adevice as specified, a guide bar, a cross head, a gib mounted for longitudinal movement in the cross head and adapted fo:

advancement thereby toward the guide bar,

a locking key carried by the cross head and engaging said gib to hold. the same from longitudinal movement on the cross head and from outward movement toward the guide bar, and means for advancing the gib against the lateral edges of the guide bar upon said longitudinal movement of the gib.

4. In a device as specified, a cross head having projecting sidewalls and a longitudinally inclined face between the side walls, a longitudinally tapered gib arranged betweenthe side walls on said inclined face and provided at its inner side with a longitudinal row of interlocking recesses, a trans verse key mounted in the cross head and having ribs engaging in said recesses of the gib to lock the latter from longitudinal and outward displacement with respect to the cross head, and means for detachably securing the key in the cross head.

' with said lockingplate extending dovetail ribs,

5. In a device as specified, a cross head having projecting walls and an inclined face between the walls, a tapering gib arranged between the walls on the inclined face and adapted for movement thereover to advance the, gib outwardly from the cross head, and a locking key secured in the cross head, said gib having recesses therein for interlocking engagement with said key to hold the gib from outward displacement from betweensaid Walls and also from adjustable move ment over the inclined face.

6. The combination with a cross head havingprojecting side walls, of a tapered longitudinal gib arranged between the said walls, and provided at-its inner face with a longitudinal row of dove-tail ribs, a transverse key dove-ta-iled in the cross head, and having a plurality of dove-tail ribs interlocking with said row of ribs at anypoint throughout the length of the row to secure the gib to thecross head in the desired longitudinally adjusted position, inner end of said key for engagement with the ribs for limiting the inward 'movement of the key, and securing means on the oppo-' site end of the key for holding the same in place when adjusted.

7. The combination with a cross head hav=- ing projecting side walls, of a taperedlongitudinal gib arranged between the side walls, a detachable locking plate secured in the inner face of said gib, a transverse key secured in the cross head, and adapted to interlock for holding the gib iron; longitudinal movement upon the cross 8. The combination with a cross head having projecting side walls, and a tapered longitudinal gib arranged between the side walls, of a locking plate dovetailed into the inner face of said gib and having inwardly and a dovetail key detachably secured in the cross head, and having a plurality of outwardly extending dovetail ribs adapted to interlock with the dovetail ribs of said locking plate. a j

9. The combination with a cross head having projecting side walls, of a tapered longitudinal gib' arranged between the said walls, a relatively long locking plate dovetailed intothe inner face of said gib, and having inwardly extending dovetail ribs counter-sunk in the inner face of the gib between said walls, and a relatively narrow key dovetailed into the cross head, and having dovetail ribs outstanding from the cross head for interlocking engagement between the ribs of said locking plate, a head on said key to limit the insertion thereof through the cross head, and means on the key for securing the same in interlocking engagement with the locking plate.

10. The combination with a cross head having projecting side walls, of a tapered longitudinal gib arranged between the side walls, a plate dovetailed into the inner face of the gib, and a key secured transversely through the cross head, and having outstanding ribS adapted to interlock with the ribs on saidlocking plate, said key being relatively narrow, whereby to engage with any of said ribs in the locking plate for holding the gib in various longitudinally adjusted positions. I

11. The combination with a cross head having longitudinal gib'arranged between the side walls, locking means extending inwardly from the gib, a key extending transversely through the cross head for engagement with said locking means, and having an outstanding threaded shank for engagement through the side of the cross head, a nut turned up upon said shank and against the to hold the key in place, and having a plurality of radial slots in its outer end, and a cotter pin secured in said slots transversely through said shank for locking the nut thereon and against the cross head.

12. The combination with across head having projecting side walls, of a tapered longitudinal walls, a row of depending dovetail ribs extending transversely across the inner face of the gib, a lockingkey dovetailed into the cross head, and extending from side to side thereof, a plurality of outwardly'extending dovetail ribs on said keyadapted to interlock with the ribs on said locking plate by the transverse sliding movement of the key, a head extending across the inner end of the key at the inner ends of, the ribs on the key, and adapted to abut the inner ends of said ribs on the locking plate to limit the sliding movement of the key in the cross head. an intermediate longitudinal enlargement on the under side of said key for reinforcing the same, a threaded projection extending outwardly from the forward end of the key and adapted to pass through the side of the cross head, a nut carried on said projection to hold the key in place, and means for securing the nut from accidental dislodgement from the threaded projection.

projecting side walls, of a tapered.

cross head gib arranged between the side 13. The combination with a cross head having projecting side walls, of a tapered longitudinal gib arranged between the side walls, locking ribs carried upon the gib within the inner face thereof, a transverse key slidable in the cross head, and having projecting ribs adapted to interlock with the ribs of said gib, a head on said key to limit the insertion thereof into the cross'head, a projection on said key, a nut engaging said projection to secure the key in the cross head, and means for locking said key from detachment.

14. In a device as specified, a cross head having projecting side walls with transversely registering openings formed in the bases thereof, a key composed of a bar extending through said openings in the side walls and extending across the space between said walls, a gib mounted for longitudinal adjustment between the side walls and having a row of openings in the base thereof adapted to register one at a time with the openings in said side walls, said key being adapted for engagement at its intermediate portion through the openings in said gib whereby to lock the same from longitudinal movement between theside walls and from outward displacement from the cross head.

15. In a device as specified, a cross head having projecting side walls and an inclined face therebetween, a gib with an inner inclined face seated between said side walls and having outwardly flaring flanges, a guide bar hai'ing. inwardly tapering lateral edges adapted to seat snugly between said outwardly flaring flanges, and means for securing the gib in adjusted position longitudinally upon said inclined face of the cross head to advance the gib toward the guide bar and take up wear at the inner face and at the lateral edges of the guide bar.

In testimony, that I claim the foregoing as my own, I have hereto aflixed my signature in the presence of two witnesses.

MILES D. JOYNER. Witnesses:

J. H. Srecnns, J. J. MAW-HINNEY. 

